A coepob



Dec. 22, 1925,-

F. E. BEST CYLINDRICAL SHELL MORTISE KNOB LOCK Filed Jul 25. 192-":

2 Sheets-Shoat 1 H r I1 1. m IQ. H.

2 Sheets-Sheet 2 F. E. BEST CYLINDRICAL SHELL MORTISE KNOB LOCK A-IVIll/11M! Filed July 23. 1925 1 Dec. 22, 1925.

Patented Dec. 22, 19 25,

FRANK ELLISON BEST, OF seam-LE,wrsfimeaesyassmma'ea rRAux E. ens'r, 1nd,; II

OF'SEATTLE, WASHINGTON,ACQRPOIBA'IPIONOE WASH;N QTQNL"GYLINDRiCAL-SHELL.MQRTIS E xnonyLoox." 1

To all whom it may coated/" nn Be it known that I, a citizen of theUnited States, residing/at of which the following is aspecifications;

My invention relates to improvements in. mortise locks. for door s, a ndthe object. of my' improvement is to provide ,a mortiselockthat may beinstalled in a door without necessitating the cutting of the-usual rec'I tangular mortise in the edge of the door, the latch mechanism ofsaidmortise lock being adapted to fit within acylindrical opening thatmay be bored instead of being. chiseled or mortised into the edge of thedoor, thus saving much time and labor in installation due to the factthat it is very much quicker and easierv to bore a cylindrical hole.than it is to mortisea rectangular hole in a door.

Another object isto provide a mortise lock of this nature that isespecially well adaptr ed tobe incorporated into a knoblock struc ture.

A further object is to provide a mortise knob lock of this natureembodying novel and efficient locking-devices arranged to be controlledby pin tumbler locking mechanism.

Other and more specificobjects ,Will be apparent .from, the followingdescription taken in connection with drawings. I

Before describing the invention indetail I desire to have it understoodthat thezinvention is not limited to the particular iconstruction and.arrangement of parts lhave illustrated and shall hereinafter describeand that various-changes may be made in the mechanismshown without de!parting from the-spirit or scope of t he'inf vention and thatthephraseology 'whichrlfj employ is for the purpose of description and;

I not for limitation.

1f I is asimilar view showing the latch s mechanism as .it, may I appear-When with.-

the accompanying, I I i latch mechanismembodying a latchbolt16 v I 1nthe accompanying drawings, Fi g ure is, view in I longitudinal" midsection; through the secondary lock orlatchsmecha-g, nism of a lockconstructed in,accordanee with my invention, said section b eing taken:inwardly drawn byv turning the knob.

F, g. 8 is a similarfragmentary the knob I I 4C is;v a. sectional viewonbrokenliney Mofl ig. l. i

Fig. 7 is a detached viewin perspective of a lock washer embodied invthe invention,

Fig. 8 18 a sect1onal.v1ew on. broken line 8-8 OfFlg.4:. 7 Likereference numerals designate like door having a cylindricalwrecessoraugerhole 9.,extending inwardly from thepfront -edge wherein the latchhOusing lO may-be inserted.

Figs. 5 and Gare sectional views on broken lines 5-5 a'nd 66:respectively of Fig. 4,

i in the planegof the Iandthe I l v nlsm' being shown in an engaged or.latched I li fg gll l-r s Of the knob, lock mechanism;.-in a lockedposition whichwill prevent 'the-retraction of the latch bolt bytheturnin g of;

Disposed within the having an inner end portion ofs reduced size that issecured by a rivet 1 7 .to the ends. of a. boltoperating'membeil8 thatis preferably formed of a thinifiat pieceof metalf bentjdouble.v Awasher ;19,;is provided 'on,'

.9 of such bolt and the endsofthe boltoperat ,1 .ing -nlember 18. toafford a flange against the bolt 16 between the shouldered portionwhichftheI end of compression spring QO'may ,abut -the,otherrendeofsaidspring. abutting gai iat -p ate atis c rr e 01, t bo pera ing@ em erland th t upp e against the; pressurey ofthe spring 20 bya lugs. 22; tthat. are zbent inwardlyf from the latch; housing; Another. lug. 23 thisis bent a h I i fi hev llef h at h hd s serves as a stop to limit theinward move- 1 shoulders 24 and, between the shoulders 24 is bent insemicircular shape to form a ter-.

minal endloop 25. I v

A locking tongue 26, preferably relatively flat, and forked at itsrearend; is integral with or otherwise rigidly secured to the bolt 16and projects rearwardl'y' therefrom as shown in Figs. 1, 2 and 3.

Extending crosswise through the door 15 and iii-tersectir'lg the "augerhole 9 atright angles thereto is another auger hole 27 wherein isdisposed acylindrical knob shank 28 that extends through the'terminalend 1001).,

of the bolt actuating member and that 1s provided at' the location ofsaid bolt actuatin'g member with two substantially opposite outwardlybent pawls 29 and 30-that are arranged to engage with the shoulders 24and withdraw the bolt 16 as shown in Fig. 2 when the shank 28 is turnedin either direction. Upon release of the shank 28 the spring 20 willreturn the several the positions shown in Fig. l.

The knob shank 2'8 isrotatably supported at one'si-de of the doorby asmaller bearing plate 31' secured to the door by screws 32and byalarger, door plate 33 that'c overs the bearing piate 31 and said knobshank is rotatably supported at the other side of door by two bearingplates 34 and 35 and a door plate The bearing plates 84 and 35 aresuitabiyflformed for the reception therebetween of a disc, 36' having aU shaped slot therein, see Figs; 4 and 8, and arranged to fitwithin'groov-es 39 in opposite sides of the shank2'8 to preventlongitudinal movement of said shank. The disc 36 is loosely "supportedand is free to rotate between the plates/34 and85. Two or more pairs ofgrooves 39 are preferably provided in the shank 2-8 to permit adjustmentof the disc 36 to doors of difi'erent thickness.

* -I*ha'veshown one end of the shank 28' internally threaded for thereception otthe externally threaded stem 40 of a lock housing41 ,.t hestem 40' being secured against rotation in the shank 28 by a key 42accessibl'e. only from the interior of the lock housing. 1A collar 43 ispreferably interposed between the'end of "the shank 28 and the end-ofthe 1ock'housing41 and a door knob 44 is secured on said lock housing.The

other end of the shank 28 I have shown as adapted toslidably receive anon-threaded stem 45 on'the end of a lock housing 46-, the stem 45'being secured tothe shank 28 by a key screw '47 embedded partly in thestem 45 and partly'inthe shank 2 8and accessible parts to.

only from the interior of the lock housing 46. A collar 48 is interposedbetween the end of the shank 28 and the end of the lock housing 46 and aknob 49 is secured on the housing 46. The knob 49 is shown as a shellknob while the knob 44 is shown solid. Either of the above describedforms of door knob and either above described means for securing thelock housing on which the door knob is mounted to the shank28 may beused at either end or at both ends of the shank 28 as desired.

Disposed within the shank 28 is a rotatable lock member having a centralportion 50 of larger diameter that is slotted as at 51 to aiiordclearance for the end of the locking tongue 26* and to leavetwooppositely disposed segmentsf52 of substantially triangular crosssectional shape against which the endof the tongue 26 may abut when thelocking member is in the locked position.

The rear end of the locking tongue is preferably of forkedconstructionto aflord clearance space intowhich the pawls'29 and 30 may be movedwhenthe knob is turned and said forked rear end of said tongue is guidedbetween lugs 53 formed at the rear end of be engaged bytheoutwardly'bent end 58 of a split resilient washer 59, Fig. 7, whichwasher is rigidly secured to the end of the adjacent lock housing stem45, and servesas' positioning means for the rotatable locking member. e1

Smaller bearing portions 60 at the extr'emities of the end portions 54of the rotat able locking member are journaled in two part bushings 61in the ends of the lock housing" stems 40 and '45 and terminate in endd'i scs '62 ineach of which are provided four radial slots 63 arrangedat intervals Of' ninety degrees and intersecting each other at thecenter. A pin 64 ec'centrically"p'osi tioned on a disc or throw member65 is are ran-gedt'o'engage within the s1ots'63 inthe; enddi'scs 62 torotate the locking-member, The'throw members 65 are secured'to keyplugs, not shown,'that are provided'within lock cores 66 which areremovably locked within. the lock 'core housings 41 and 46.

The pins 64 are'arran-ged to describe .an arc as shown by dotted linesin Fig. 5 when the throw members .65 are rotated, and, in moving in*either"directio'n'through that part of their path of, movementthat'overla s the will turn the rotatable locking member 50 vendoft helocking member 50 the pins 64.

' movingsaid locking member eitherfrom the; positionshown in Fig.1, inwhich it permits retraction of boltgl6 to the position jacent shoulder24 serving to withdraw the bolt. lVhen-the triangular members are in theposition shown in Fig. 3 they wlllbe in alignment with the lockingtongue 26 which will strike against such members and prevent retractionof the bolt 16 when an at-- tempt is made to turn either door knob.

Seating of the spring-like end58 of the washer 59 in the radial grooves57 orv shoulder 62 frictionally prevents displacement of the rotarylocking member 50 within the shank 28, and insures that the grooves 63'will always be properly positioned to receive the pins 64 and thetriangular locking segments 52 will always be accurately held either inthe unlocked position shown in Fig. 1 or the locked position shown inFig. 8.

l/Vhen the knob shank 28 is rotated the locking member 50 will berotated therewith thus carrying the triangular. segments 52 around intothe position shown in Fig. 3

when the bolt 16 is retracted. The knobs on both sides being providewith lock mechanism, make it possible either to lock or unlock the doorfrom either side.

The lock is relatively simple in construction, is reliable and efficientin operation, is not expensive to manufacture, and 'is especially welladapted to be incorporated into knob lock structures where ornamentalfeatures ard beauty of design are emphasized.

Simpliclty of installation is an lmportant feature of this lock,theusual mortise being dispensed with and it only being necessary to boretwo intersecting holes in a door to install the lock.

The foregoing description and accompanying drawings clearly disclosewhat I now consider to be apreferred embodiment of the invention but itwill be understood that this disclosure is merely illustrative and thatsuch changes in the device may be'made as are within the scope andspirit of the following claims.

I claim:

1. A lock of the class described embodying a cylindrical latch housing,a bolt operating member in said latch housing, a bolt secured to saidbolt operating member, shoulders formed at the rear end of said boltoperating member, a tubular knob shank extending crosswise of the rearend of said bolt operating member oppositely disposed lugs protrudingfromi-saidknob shank. the walls or said knob shankbeing cutaway betweensaid p, lugs oii the forwardsi'de,'arotatable locking. member-insaidzknob shank,-lock controlled means forpoSitioning said lockingmember in said knob shank,'yielding meansfor hold-g I ing:said lockingmember in. a fixed position: 1' in said knob shank, and a locking tongueon said bolt arranged 'to project through the opening in said knob'shankand to engage with said locking member when said locking member is in alocked position.

2. Ina lock oi the class described-a rotatably mounted locking memberhaving'a flatdisc like end provided with tour radial grooves arranged atintervals of ninety degrees, and a pin movable in an arc and ar-' rangedto enter said grooves and turn said 1 locking member through anwangle.of ninety degrees. a

3. In a lockof the class described, a rotatably mounted locking memberhavinga fiat disc'like .e-nd provided with four radial grooves arrangedat intervals of ninety degrees, a key operated lock having a throwmember arranged to be rotated about an axis external to, andadiacent theperiphery of j H the disc likeend of said locking member and a pm onsaid throw member at apoint removed from the center and arrangedto entersaid grooves and move said locking member through an angle of ninetydegrees when I said throw member is rotated.

4c. Ina lock of the class described a cylindrical latch housing, a boltoperable in said latch housing, a spring urging said bolt outwardly, abolt operating member embodying a strip bent double and having-itsforward ends secured to said bolt, aknob shank extending through therear portion of said bolt operating member and arranged to retractrearward movement of said locking tongueQ 5. In a lock of the classdescribed a cylindrical latch housing, a bolt operating member formed ofa strip of metal bent double and operatively' disposed in said latchhous ing, a bolt secured to one end of said bolt operating member, meansguiding-said bolt. operating memberfor sliding movement in said latchhousing, resilient devices, urging said bolt operating member outwardly,a

loop portion formed in the rear end of said bolt operating membershoulders adjacent said loop portion, a tubular knob shank extendingthrough said loop portion, oppositely disposed outwardly protruding lugson said knob shank arranged to engage with the shoulders on said boltoperating member to 7 move said bolt operating member rearwardlv' 5 y awhen said knob shank is turned, said knob tween said lugs, a lockingmember: rotatable in said knob shank and cutawav at the 10- 'cation ofthe cut away portion of said knob shank to leave two oppositely disposedsegments, look controlled means for positioning said locking member in'said -knob shank,

and a locking tongue extending rearwardly from said bolt and terminatingadjacent the opening in the Wall of said knob shank.

Signed at- Seattle Washington this 13th day ofJuly 1923. r r

FRANK ELLISON ,BESTT

